Question About Campaign Specific Armors

I currently own Nightfalls and Factions but not Proph and EotN. There is an armor set in in Proph (elite gladiator) that I would very much like to get the greaves and leggings for.

Anyways, I have a ten hour free trial I can use for Proph and I was wondering if I use that, craft the armor, and then return to Elonia or Cantha will I still be able to wear that armor after the trial time expires?

A Simple answer: YES

Yes, you get to keep everything but the skills, heroes and professions for the games you do not own. Just remember that the trial key starts the moment you input it, so don't spend 10 hours idling in Factions and NF or your trial will end.

Actually, the 10 hours of trial only counts time you spend in that campaign's regions, not when you're elsewhere. As long as the OP stays out of Tyria, he'll only have to worry about the 14 day limit on the trial key. Been through the Factions & Nightfall trials on my account - played a couple of hours of each, got distracted for a few days back in Tyria, then came back and played for the rest of their hours over the course of another 3 or 4 days)

That is incorrect Ogre. It starts as soon as you put it in. That's the difference between a trial account and a guest account.

There's a more complicated answer?

I can only relate, as above, what has been my own experience with the trial keys included in the Guild Wars: Game of the Year Edition package (same pamphlet design for the trial keys in the Factions Platinum Edition and EotN boxes, so I'd assume they work the same as the ones from GotY did):

10 hours of play time, counted only when in the region covered by the campaign you have the trial, usable any time (and non-consecutively) over a 14 day period from the time you unlocked them.

When you go have a guildie run you there it will save time.